Gabriele Cosmo
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// -------------------------------------------------------------------
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// GEANT 4 class implementation file
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//
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// CERN, Geneva, Switzerland
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//
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// File name: G4KaonMinusField.cc
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//
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// Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it)
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//
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// Creation date: 5 June 2000
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// -------------------------------------------------------------------
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#include "G4KaonMinusField.hh"
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#include "G4NucleiPropertiesTable.hh"
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#include "G4VNuclearDensity.hh"
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#include "G4FermiMomentum.hh"
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#include "G4KaonMinus.hh"
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#include "G4HadTmpUtil.hh"
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G4KaonMinusField::G4KaonMinusField(G4V3DNucleus * nucleus, G4double coeff)
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: G4VNuclearField(nucleus)
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{
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theCoeff = coeff;
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}
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G4KaonMinusField::~G4KaonMinusField()
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{ }
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const G4KaonMinusField & G4KaonMinusField::operator=(const G4KaonMinusField &)
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4KaonMinusField::operator= meant not to be accessible");
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return *this;
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}
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G4int G4KaonMinusField::operator==(const G4KaonMinusField &) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4KaonMinusField::operator== meant not to be accessible");
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return 0;
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}
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G4int G4KaonMinusField::operator!=(const G4KaonMinusField &) const
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{
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throw G4HadronicException(__FILE__, __LINE__, "G4KaonMinusField::operator!= meant not to be accessible");
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return 1;
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}
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G4double G4KaonMinusField::GetField(const G4ThreeVector & aPosition)
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{
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// Field is 0 out of the nucleus!
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if(aPosition.mag() >= radius) return 0.0;
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G4double kaonMass = G4KaonMinus::KaonMinus()->GetPDGMass();
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G4double A = theNucleus->GetMassNumber();
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G4double Z = theNucleus->GetCharge();
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G4double bindingEnergy = G4NucleiPropertiesTable::GetBindingEnergy(G4lrint(Z), G4lrint(A));
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G4double nucleusMass = Z*proton_mass_c2+(A-Z)*neutron_mass_c2+bindingEnergy;
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G4double reducedMass = kaonMass*nucleusMass/(kaonMass+nucleusMass);
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G4double density = theNucleus->GetNuclearDensity()->GetDensity(aPosition);
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return -2.*pi*hbarc*hbarc/reducedMass*(2.0)*theCoeff*density+GetBarrier();
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}
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G4double G4KaonMinusField::GetBarrier()
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{
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G4double A = theNucleus->GetMassNumber();
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G4double Z = theNucleus->GetCharge();
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G4double coulombBarrier = (1.44/1.14) * MeV * Z / (1.0 + std::pow(A,1./3.));
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return -coulombBarrier;
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}
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